General opinion is that a side job is one that supports the main income of an individual, often times perceived as something that brings little money to add to what you make from your day job. If Mr X earns better from a side job when compared to the income from his career option, does the side job still qualify to be called a side job?
Haha, good one op! The main job will always be the main job if you want it to be. It depends entirely on the person or on the perspective of another. Some may see main jobs as main income provider while others may think main jobs are jobs that consume the most time and effort from a person. Whatever the case, as long as it keeps a roof over your head and food on the table, it doesn't really matter that much what it is called.
That is the type of thing that my friends are all doing and I do not understand. They have their main job that makes them money, and they see that as their job. I would say that have your own job that you want to do in the world, you could have a "main job" that gives you money, but then for the rest of your hours, focus on doing what you want to do. Let that consume every single hour of your life.
I work nearly 12-13 hours a day, all for the "main" job that I have because I found the job that I love the most, it is the most magnificent job for me, it is content writing and many people may not like it and hate it but the reality is that I still love it and it is perfect for me.
If you can't let your favourite thing in the world consume every single minute you have, then you are not going to turn that into your main job and will hate your whatever main job you have that brings only income and no fun for the rest of your life.